Title
Electric field tuning of the optical excitonic Aharonov-Bohm effect in nanodots grown by droplet epitaxy Electric field tuning of the optical excitonic Aharonov-Bohm effect in nanodots grown by droplet epitaxy
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Stockholm ,
Subject
Physics
Source (journal)
Physica scripta. - Stockholm
Volume/pages
T157(2013) , 5 p.
ISSN
0031-8949
0031-8949
Article Reference
014002
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Abstract
Neutral excitons in axially symmetric GaAs nanodots embedded in an (Al, Ga) As matrix, which are formed by the droplet epitaxy technique, are investigated theoretically. An electric field perpendicular to the nanodot base results in both a vertical and an in-plane exciton polarization, which is beneficial for the appearance of the excitonic Aharonov-Bohm effect. In the range of low magnetic fields (below 5 Tesla), we found that the bright and dark exciton states can cross twice. This results in oscillations of the photoluminescence intensity with magnetic field, which are a striking manifestation of the optical excitonic Aharonov-Bohm effect.
E-info
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